CN106969876B - Dynamic total pressure probe with temperature correction function - Google Patents
Dynamic total pressure probe with temperature correction function Download PDFInfo
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- CN106969876B CN106969876B CN201710198363.4A CN201710198363A CN106969876B CN 106969876 B CN106969876 B CN 106969876B CN 201710198363 A CN201710198363 A CN 201710198363A CN 106969876 B CN106969876 B CN 106969876B
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- probe
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- temperature sensor
- temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0092—Pressure sensor associated with other sensors, e.g. for measuring acceleration or temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/04—Means for compensating for effects of changes of temperature, i.e. other than electric compensation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L2019/0053—Pressure sensors associated with other sensors, e.g. for measuring acceleration, temperature
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention belongs to the technical field of temperature and pressure tests, and discloses a dynamic total pressure probe with a temperature correction function. The probe comprises a probe head and a supporting rod (1), a pressure hole (2) and a temperature sensor mounting hole (3) are formed in the cylindrical surface of the probe head, a dynamic pressure sensor is mounted in the position, close to the pressure hole (2), in the probe head, a temperature sensor sensing part is mounted on the temperature sensor mounting hole (3), and a temperature sensor lead (4) and a pressure sensor lead (5) are led out from the interior of the supporting rod (1). Compared with the traditional probe, the combined probe has the advantages that the size of the combined probe is smaller than that of the traditional probe, so that the influence on a flow field is effectively reduced, the total pressure measurement can be corrected by utilizing a temperature measurement result, and the accuracy of the measurement result is improved.
Description
Technical Field
The invention belongs to the technical field of pressure and temperature testing, and relates to a dynamic total pressure probe with temperature correction.
Background
Temperature and pressure are two important parameters of the flow field. The pressure probe is widely applied to flow field measurement by the advantages of simple structure, firmness, durability, easy operation and the like, and the thermocouple and the thermal resistor are main technical means for temperature measurement. However, the conventional pressure probe or temperature probe can only measure a single parameter of the flow field, and the measurement of multiple parameters mainly depends on the simultaneous use of multiple probes. The aeroengine has a complex internal structure, axial and radial spaces inside the rotor and between the rotor and the rotor/stator are very narrow, and the use of the probes, especially the simultaneous use of a plurality of probes, inevitably influences the flow field, causes the blocking phenomenon and influences the measurement precision.
In the measurement process of dynamic pressure, in order to ensure the frequency response of the sensor, the sensor is generally arranged at the head of a probe and is relatively close to a measured flow field, and when the temperature of the flow field changes violently, the temperature drift of the pressure sensor can occur, so that the accuracy of a measurement result is influenced. Therefore, a dynamic pressure probe technology which can realize multi-parameter measurement and temperature correction is lacked in the current scientific research and practical engineering application.
Disclosure of Invention
The invention mainly solves the technical problems that: aiming at the lack of a dynamic pressure probe technology which can give consideration to multi-parameter measurement and temperature correction in the current scientific research and practical engineering application, the combined probe is adopted to simultaneously obtain parameters such as flow field temperature and dynamic total pressure, the adverse effect of a plurality of probes on a flow field is reduced, the adverse effect of temperature on a pressure sensor is corrected, and the accuracy of a measurement result is improved.
The technical solution of the invention is as follows:
the invention comprises a probe head and a support rod (1), wherein the probe head comprises a pressure hole (2) and a temperature sensor mounting hole (3). The temperature sensor lead (4) and the pressure sensor lead (5) are led out from the inside of the support rod (1).
Furthermore, the probe supporting rod (1) is of a cylindrical columnar hollow structure, the diameter of the supporting rod (1) is 4-10 mm, and the inner diameter of the supporting rod (1) is 1 mm smaller than the outer diameter.
Furthermore, the size of the pressure hole (2) is consistent with that of the temperature sensor mounting hole (3), the aperture is 0.1-5 mm, the two holes are located at the same circumferential position of the cylindrical surface of the head of the probe, the distance between the circle centers of the two holes is 1.2-1.5 times of the aperture, and the pressure hole (2) can be arranged above or below the temperature sensor mounting hole (3).
Furthermore, a temperature sensor sensing part is arranged on a temperature sensor mounting hole (3), and a pressure sensor is arranged in the probe head part close to the pressure hole (2).
Further, the temperature sensor is selected from a thermocouple or a thermal resistor.
The invention has the beneficial effects that: the influence on the measured flow field is small, the total temperature and total pressure parameters of the flow field can be obtained at the same time, the temperature of the dynamic pressure measurement result can be corrected, and the accuracy of the measurement result is improved.
Drawings
FIG. 1 is a schematic diagram of a dynamic total pressure probe with its own temperature correction.
The device comprises a probe support rod 1, a pressure hole 2, a temperature sensor mounting hole 3, a temperature sensor lead 4 and a pressure sensor lead 5.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in figure 1, the invention comprises a probe head and a support rod (1), wherein the probe head comprises a pressure hole (2) and a temperature sensor mounting hole (3). The temperature sensor lead (4) and the pressure sensor lead (5) are led out from the inside of the support rod (1).
The probe supporting rod (1) is of a cylindrical hollow structure, the diameter of the supporting rod (1) is 4 mm, and the inner diameter of the supporting rod (1) is 1 mm smaller than the outer diameter.
The pressure hole (2) and the temperature sensor mounting hole (3) are consistent in size, the aperture is 0.4 mm, the two holes are located at the same circumferential position of the cylindrical surface of the head of the probe, the distance between the circle centers of the two holes is 1.2, and the two mounting holes can be interchanged.
The temperature sensor sensing part is arranged on the temperature sensor mounting hole (3), and the pressure sensor is arranged in the probe head part close to the pressure hole (2).
The temperature sensor is a thermocouple.
The dynamic total pressure probe with the temperature correction introduced in the embodiment of the invention can obtain calibration data through calibration and calibration. During actual flow field measurement, a voltage signal of the pressure sensor can be obtained through a lead of the pressure sensor, a voltage signal of the temperature sensor can be obtained through a lead of the temperature sensor, data processing is carried out by utilizing obtained calibration data, steady state information such as the temperature and the dynamic total pressure of the flow field can be obtained, and meanwhile temperature correction can be carried out on a dynamic pressure measurement result.
Claims (1)
1. The dynamic total pressure probe with the temperature correction function is characterized by comprising a probe head and a support rod (1), wherein the probe head comprises a pressure hole (2) and a temperature sensor mounting hole (3), a temperature sensor lead (4) and a pressure sensor lead (5) are led out from the inside of the support rod (1), and the probe is adopted to simultaneously obtain the flow field temperature and the dynamic total pressure parameters, so that the adverse effect of a plurality of probes on the flow field is reduced, the adverse effect of the temperature on the pressure sensor is corrected, and the accuracy of a measuring result is improved;
the probe supporting rod (1) is of a cylindrical hollow structure, the diameter of the supporting rod (1) is 4 mm, and the inner diameter of the supporting rod (1) is 1 mm smaller than the outer diameter of the supporting rod;
the pressure hole (2) and the temperature sensor mounting hole (3) are consistent in size, the aperture is 0.4 mm, the two holes are located at the same circumferential position of the cylindrical surface of the head of the probe, the distance between the circle centers of the two holes is 1.2 times of the aperture, and the pressure hole (2) can be arranged above or below the temperature sensor mounting hole (3);
the temperature sensor sensing part is arranged on the temperature sensor mounting hole (3), and the pressure sensor is arranged in the probe head part close to the pressure hole (2);
the temperature sensor is selected from a thermocouple or a thermal resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710198363.4A CN106969876B (en) | 2017-03-29 | 2017-03-29 | Dynamic total pressure probe with temperature correction function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710198363.4A CN106969876B (en) | 2017-03-29 | 2017-03-29 | Dynamic total pressure probe with temperature correction function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106969876A CN106969876A (en) | 2017-07-21 |
| CN106969876B true CN106969876B (en) | 2020-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710198363.4A Active CN106969876B (en) | 2017-03-29 | 2017-03-29 | Dynamic total pressure probe with temperature correction function |
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| Country | Link |
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| CN (1) | CN106969876B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110375707B (en) * | 2019-08-23 | 2021-07-02 | 辽宁有色基础工程有限公司 | System and method for remotely monitoring dangerous rock body deformation of top plate of stone cave temple in real time |
| KR102360197B1 (en) * | 2020-08-07 | 2022-02-08 | 국방과학연구소 | Total pressure measuring probe |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH521657A (en) * | 1970-12-14 | 1972-04-15 | Proton Ag | Measurement device with removable measurement probe |
| US4271859A (en) * | 1979-11-26 | 1981-06-09 | United Technologies Corporation | Temperature sensor |
| CN201662459U (en) * | 2009-09-07 | 2010-12-01 | 天津空中代码工程应用软件开发有限公司 | Combined measuring tool for flow field pressure and speed |
| CN101788313B (en) * | 2010-03-23 | 2011-06-29 | 上海交通大学 | High-frequency response fluid transient flow meter |
| CN203053472U (en) * | 2012-09-18 | 2013-07-10 | 天津空中代码工程应用软件开发有限公司 | Tool for measuring pressure and velocity of eddy flow field |
| CN204373690U (en) * | 2015-01-13 | 2015-06-03 | 西安远方航空技术发展总公司 | A kind of stagnation temperature total pressure measure apparatus |
| CN106483330A (en) * | 2016-12-07 | 2017-03-08 | 中南大学 | One kind is based on reflective silk thread attitude angle visual identity two-D wind speed wind direction method of testing |
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2017
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| CN106969876A (en) | 2017-07-21 |
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